Full Text Searchable PDF User Manual
Please read this manual carefully before operating your set and retain it for future reference.
E-View
Multi Air Conditioner
A4UW30GFH0 [LMU300HHV] / A3UW24GFH0 [LMU240HHV]
A2UW18GFH0 [LMU180HHV]
P/NO : MFL67452453
SERVICE MANUAL
AIR
CONDITIONER
CONFIDENTIAL
Any reproduction, duplication, distribution (including by way of email, facsimile or other electronic means), publication,
modification, copying or transmission of this Service Manual is STRICTLY PROHIBITED unless you have obtained the prior
written consent of the LG Electronics entity from which you received this Service Manual. The material covered by this
prohibition includes, without limitation, any text, graphics or logos in this Service Manual.
Copyright © 2017 LG Electronics Inc. All rights reserved. Only training and service purposes.
- 2 -
1. Specification
Note:
1. All data are based on the following conditions:
- Cooling Temperature : Indoor 26.7°C(80°F) DB / 19.4°C(66.9°F) WB
Outdoor 35°C(95°F) DB / 23.9°C(75°F) WB
- Heating Temperature : Indoor 21.1°C(70°F) DB / 15.6°C(60.1°F) WB
Outdoor 8.3°C(46.9°F) DB / 6.1°C(43°F) WB
- Piping Length : Interconnected Pipe Length = 5 m (16.4 ft)
- Difference Limit of Elevation (Outdoor ~ Indoor Unit) is Zero.
2. Wiring cable size must comply with the applicable local and national code.
3. Due to our policy of innovation some specifications may be changed without
notification.
4. Sound Level Values are measured at Anechoic chamber.
Therefore, these values can be increased(maximum 3dB(A)) owing to ambi-
ent conditions during opration.
** : The unit could be operated on the followig temperature range only when Low
Ambient Kit installed.
- Cooling : Outdoor Temperature -20°C(-4°F) ~ -10°C(14°F) DB
Model Name
A2UW18GFH0
[LMU180HHV]
A3UW24GFH0
[LMU240HHV]
A4UW30GFH0
[LMU300HHV]
Capacity
Nominal
Btu/h Class
18,000
24,000
30,000
Cooling
Min~Rated~Max
Btu/h
8400~18000~19980
8400~24000~30000
8400~28400~34080
Heating
Min~Rated~Max
Btu/h
10248~22000~24000
10248~26000~31200
10248~28600~41600
Power Input
Cooling
Min~Rated~Max
kW
0.87~1.33~1.92
0.93~1.78~2.63
0.94~2.27~3.47
Heating
Min~Rated~Max
kW
1.24~2.20~3.29
1.25~2.12~3.47
1.29~2.32~3.55
EER/COP
Non Ducted
-
13.5/2.9
13.5/3.6
12.5/3.6
SEER/HSPF
Non Ducted
-
21.0/10.0
21.0/10.7
20.0 / 11.0
Mixed
-
19.25/9.5
19.0/9.85
18.75/10.25
Ducted
-
17.5/9.0
17.0/9.0
17.5/9.5
Power Supply
V, Ø, Hz
208/230, 1, 60
208/230, 1, 60
208/230, 1, 60
Running Current
Cooling
Min~Rated~Max
A
4.1~6.1~8.7
4.2~7.8~11.9
4.0~10.2~16.7
Heating
Min~Rated~Max
A
5.6~9.8~14.9
4.8~9.9~14.9
4.2~10.9~15.9
Starting Current
Cooling
Max
A
-
-
-
Heating
Max
A
-
-
-
Wiring Connections
Power Supply Cable (Included Earth)
No. x AWG
3C x 12
3C x 12
3C x 12
Power and Communication Cable
(Included Earth)
Outdoor ~ BD Unit
No. x AWG
-
-
-
Combination
Sum of Indoor Units Capacity
Max
kBth/h
24
33
40
Number of Indoor Units
Max
EA
2
3
4
Number of BD Units
Max
EA
-
-
-
Casing Color
-
Warm Gray
Warm Gray
Warm Gray
Dimensions
W x H x D
mm
950 x 834 x 330
950 x 834 x 330
950 x 834 x 330
W x H x D
inch
37-13/32 x 32-27/32 x 13
37-13/32 x 32-27/32 x 13
37-13/32 x 32-27/32 x 13
New Weight
kg(lbs)
67 (147.7)
69 (152.1)
69 (152.1)
Compressor
Type
-
Twin Rotary
Twin Rotary
Twin Rotary
Model
Model x No.
GJT325M X 1
GJT325M X 1
GJT325M X 1
Motor Type
-
BLDC
BLDC
BLDC
Motor Output
W x No.
-
-
-
Refrigerant
Type
-
R410A
R410A
R410A
Precharged Amount
g (oz)
2,800 (98.8)
3,200 (112.8)
3,200 (112.8)
Chargeless-Pipe Length
m (ft)
15 (49.2)
22.5 (73.8)
30 (98.4)
Additional Charging Volume
g/m (oz/ft)
20 (0.22)
20 (0.22)
20 (0.22)
contorl
-
Electronic Expansion Valve Electronic Expansion Valve Electronic Expansion Valve
Refrigerant Oil
Type
-
FVC68D
FVC68D
FVC68D
Charged volume
cc x No.
950 x 1
950 x 1
950 x 1
Heat Exchanger
(Row x Column x Fins per inch) x No.
-
(3 x 38 x 16) x 1
(3 x 38 x 16) x 1
(3 x 38 x 16) x 1
Fan
Type
-
Propeller
Propeller
Propeller
Air Flow Rate
m
3
/min(ft
3
/min) x No.
65 (2,295)
65 (2,295)
65 (2,295)
Fan Motor
Type
-
BLDC
BLDC
BLDC
Output
W x No.
124.2 x 1
124.2 x 1
124.2 x 1
Sound Pressure Level
Cooling
Rated
dB(A)
50
52
52
Heating
Rated
dB(A)
54
55
55
Sound Power Level
Cooling
Rated
dB(A)
-
-
-
Piping Connections
Liquid
Outer Dia.
mm(inch)
Ø6.35 (1/4)
Ø6.35 (1/4)
Ø6.35 (1/4)
Gas
Outer Dia.
mm(inch)
Ø9.52 (3/8)
Ø9.52 (3/8)
Ø9.52 (3/8)
Piping Length
Total Piping
Max.
m (ft)
50 (164)
75 (246.1)
75 (246.1)
Main Piping
Max.
m (ft)
-
-
-
Total Branch Piping
Max.
m (ft)
-
-
-
Each Branch Piping
Max.
m (ft)
25 (82.0)
25 (82.0)
25 (82.0)
Maximum Height
Difference
Outdoor Unit ~ Indoor Unit
Max.
m (ft)
15 (49.2)
15 (49.2)
15 (49.2)
Indoor Unit ~ Indoor Unit
Max.
m (ft)
7.5 (24.6)
7.5 (24.6)
7.5 (24.6)
BD Unit ~ Indoor Unit
Max.
m (ft)
-
-
-
Operation Range
(Outdoor Temperature)
Cooling
Min. ~ Max.
℃ DB(℉ DB)
-20(-4)** ~ 48(118)
-20(-4)** ~ 48(118)
-20(-4)** ~ 48(118)
Heating
Min. ~ Max.
℃ DB(℉ DB)
-25 (-13) ~ 24 (75)
-25 (-13) ~ 24 (75)
-25 (-13) ~ 24 (75)
- 3 -
2. List of Functions & Accessory
Note :
O : Applied, × : Not applied
2.2 List of Accessory
2.1 List of Functions
Note :
O : Applied, × : Not applied
Accessory model name : Installed at field, ordered and purchased separately by the corresponding model name, supplied with separate package.
Category
Functions
A4UW30GFH0[LMU300HHV]
A3UW24GFH0[LMU240HHV]
A2UW18GFH0[LMU180HHV]
Reliability
Defrost/Deicing
O
High pressure switch
X
Low pressure switch
X
Phase protection
X
Restart delay (3-minutes)
O
Self diagnosis
O
Soft start
O
Test function
X
Convenience
Night Silent Operation
O
Wiring Error Check
O
Peak Control
O
Mode Lock
O
Forced Cooling Operation (Outdoor Unit)
O
Network function
Network soluation(LGAP)
O
Device
A4UW30GFH0[LMU300HHV]
A3UW24GFH0[LMU240HHV]
A2UW18GFH0[LMU180HHV]
Central Controller
AC Ez (Simple Controller)
PQCSZ250S0
AC Ez Touch
PACEZA000
AC Smart IV
PACS4B000
ACP IV
PACP4B000
AC Manager IV
PACM4B000
PI485
PMNFP14A0/PMNFP14A1
BNU (Building Network Unit)
LONWORKS Gateway
PLNWKB000
BACnet Gateway
PQNFB17C0
Installation
Y branch
X
Header branch
X
Air Guide
X
PDI (power distribution indicator)
PQNUD1S00
ODU Dry Contact
X
Low Ambient Kit
O (Logical operation)
- 4 -
3. Piping Diagrams
M
Discharge
Temperature
Thermistor
Suction
Temperature
Thermistor
Inverter
Accumulator
Compressor
Electronic
Expansion
Valve
Condenser Out
Temperature
Thermistor
Inlet Air
Temperature
Thermistor
Outdoor Unit
Ø 6.35
Flare Connection
Ø9.52
Flare Connection
Condensing
Temperature
Thermistor
ROOM A
ROOM A
ROOM B
Field Piping
Liquid(Ø6.35)
Field Piping
Gas(Ø9.52)
: Cooling
: Heating
ROOM B
ROOM C
ROOM D
Main SVC V/V
ROOM C
ROOM D
Main SVC V/V
Pressure
Sensor
PCB Connector
Description
CN_MID_BR
Cond Middle Pipe
CN_DISCHARGE_BK
Discharge Pipe
CN_C_PIPE_VI
Cond Out Pipe
CN_SUCTION_GR
Suction Pipe
CN_AIR_YL
Air
CN_H_PRESS_RD
Pressure Sensor
CN_H_GAS_BK
Hot Gas Valve
CN_4WAY_YL
4WAY valve
CN_HEATER_BL
Base pan heater
3.1 30k
- 5 -
M
Discharge
Temperature
Thermistor
Suction
Temperature
Thermistor
Inverter
Accumulator
Compressor
Electronic
Expansion
Valve
Condenser Out
Temperature
Thermistor
Inlet Air
Temperature
Thermistor
Outdoor Unit
Ø 6.35
Flare Connection
Ø9.52
Flare Connection
Condensing
Temperature
Thermistor
ROOM A
ROOM A
ROOM B
Field Piping
Liquid(Ø6.35)
Field Piping
Gas(Ø9.52)
: Cooling
: Heating
ROOM B
ROOM C
Main SVC V/V
ROOM C
Main SVC V/V
Pressure
Sensor
PCB Connector
Description
CN_MID_BR
Cond Middle Pipe
CN_DISCHARGE_BK
Discharge Pipe
CN_C_PIPE_VI
Cond Out Pipe
CN_SUCTION_GR
Suction Pipe
CN_AIR_YL
Air
CN_H_PRESS_RD
Pressure Sensor
CN_H_GAS_BK
Hot Gas Valve
CN_4WAY_YL
4WAY valve
CN_HEATER_BL
Base pan heater
3.2 24k
- 6 -
M
Discharge
Temperature
Thermistor
Suction
Temperature
Thermistor
Inverter
Accumulator
Compressor
Electronic
Expansion
Valve
Condenser Out
Temperature
Thermistor
Inlet Air
Temperature
Thermistor
Outdoor Unit
Ø 6.35
Flare Connection
Ø9.52
Flare Connection
Condensing
Temperature
Thermistor
ROOM A
ROOM A
ROOM B
Field Piping
Liquid(Ø6.35)
Field Piping
Gas(Ø9.52)
: Cooling
: Heating
ROOM B
Main SVC V/V
Main SVC V/V
Pressure
Sensor
PCB Connector
Description
CN_MID_BR
Cond Middle Pipe
CN_DISCHARGE_BK
Discharge Pipe
CN_C_PIPE_VI
Cond Out Pipe
CN_SUCTION_GR
Suction Pipe
CN_AIR_YL
Air
CN_H_PRESS_RD
Pressure Sensor
CN_H_GAS_BK
Hot Gas Valve
CN_4WAY_YL
4WAY valve
CN_HEATER_BL
Base pan heater
3.3 18k
- 7 -
4. Wiring Diagrams
4.1 30k
- 8 -
4.2 24k
- 9 -
4.3 18k
- 10 -
SW1
CN-BLDC
CN-MID
CN-LGMV
CN-AIR
CN-C_PIPE
CN-SUCTION
CN-DISCHARGE
CN-H_PRESS
CN-EEV4
CN-EEV3
CN-EEV2
CN-EEV1
CN-H_GAS
CN-4WAY
CN-HEATER2
REACTOR_OUT1
REACTOR_IN
REACTOR_OUT2
CN-POWER
CN-UVW
INV PCB
- 11 -
5. Exploded View
349480
437211
237202
559010
546810
137213C
447910
435512
554031
435300
554160
550140
W6200
649950
268711A
430410
137213A
435301
263230A
263230B
561410
263230C
W6631
437212
552115
552113
263230D
263230E
268711B
W49810
552203A
165000
552203B
661400C
661400B
661400A
552200B
661400D
552116
W6640A
W6640B
152503
W4986B
W4986A
549610
552202
137213B
Location No.
Description
Sensor Information
Housing Color
263230A
Thermistor(CN_DISCHA_BK)
Discharge Pipe
Black
263230B
Thermistor(CN_SUCTION_GR)
Suction Pipe
Green
263230C
Thermistor(CN_C_PIPE_VI)
Cond Out Pipe
Violet
263230D
Thermistor(CN_MID_BR)
Cond Middle Pipe
Brown
263230E
Thermistor(CN_AIR_YL)
Air
Yellow
165000
CN_H_PRESS_RD
Pressure Sensor
Red
5.1 30k
- 12 -
349480
437211
237202
559010
546810
137213C
447910
435512
554031
435300
554160
550140
W6200
649950
268711A
430410
137213A
435301
263230A
263230B
561410
263230C
W6631
437212
552115
552113
263230D
263230E
268711B
W49810
552203A
165000
552203B
661400C
661400B
661400A
552200B
552116
W6640A
W6640B
152503
W4986B
W4986A
549610
552202
137213B
Location No.
Description
Sensor Information
Housing Color
263230A
Thermistor(CN_DISCHA_BK)
Discharge Pipe
Black
263230B
Thermistor(CN_SUCTION_GR)
Suction Pipe
Green
263230C
Thermistor(CN_C_PIPE_VI)
Cond Out Pipe
Violet
263230D
Thermistor(CN_MID_BR)
Cond Middle Pipe
Brown
263230E
Thermistor(CN_AIR_YL)
Air
Yellow
165000
CN_H_PRESS_RD
Pressure Sensor
Red
5.2 24k
- 13 -
349480
437211
237202
559010
546810
137213C
447910
435512
554031
435300
554160
550140
W6200
649950
268711A
430410
137213A
435301
263230A
263230B
561410
263230C
W6631
437212
552115
552113
263230D
263230E
268711B
W49810
552203A
165000
552203B
661400B
661400A
552200B
552116
W6640A
W6640B
152503
W4986B
W4986A
549610
552202
137213B
Location No.
Description
Sensor Information
Housing Color
263230A
Thermistor(CN_DISCHA_BK)
Discharge Pipe
Black
263230B
Thermistor(CN_SUCTION_GR)
Suction Pipe
Green
263230C
Thermistor(CN_C_PIPE_VI)
Cond Out Pipe
Violet
263230D
Thermistor(CN_MID_BR)
Cond Middle Pipe
Brown
263230E
Thermistor(CN_AIR_YL)
Air
Yellow
165000
CN_H_PRESS_RD
Pressure Sensor
Red
5.3 18k
